Janus-type Organic-Inorganic Thin-layer Composite Membranes for Hypersaline Oily Wastewater Desalination by Membrane Distillation

Da-wei Wang; Kai Li; Ting Shen; Xiao Yu; Hao-zhen Du; Hao-cheng Yang; Zhi-kang Xu

doi:10.11777/j.issn1000-3304.2026.25322

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Janus-type Organic-Inorganic Thin-layer Composite Membranes for Hypersaline Oily Wastewater Desalination by Membrane Distillation

更新时间：2026-03-24

- Janus-type Organic-Inorganic Thin-layer Composite Membranes for Hypersaline Oily Wastewater Desalination by Membrane Distillation
- Acta Polymerica Sinica Pages: 1-9(2026)
- 作者机构：
  
  1.浙江大学高分子科学与工程学系高分子合成与功能构造教育部重点实验室浙江省先进有机材料与应用技术重点实验室杭州 310058
  2.浙江大学功能高分子国际研究中心海宁 314400
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.25322
  CLC：
- CSTR：32057.14.GFZXB.2026.7562
- Received：22 December 2025，
  
  Accepted：09 February 2026，
  
  Online First：24 March 2026，
- 稿件说明：
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王大伟, 李凯, 申婷, 于潇, 杜昊臻, 杨皓程, 徐志康. Janus型有机-无机薄层复合膜的制备及其高盐含油废水膜蒸馏性能. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.25322.

Wang, D. W.; Li, K.; Shen, T.; Yu, X.; Du, H. Z.; Yang, H. C.; Xu, Z. K. Janus-type organic-inorganic thin-layer composite membranes for hypersaline oily wastewater desalination by membrane distillation. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.25322.
王大伟, 李凯, 申婷, 于潇, 杜昊臻, 杨皓程, 徐志康. Janus型有机-无机薄层复合膜的制备及其高盐含油废水膜蒸馏性能. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.25322. DOI： CSTR： 32057.14.GFZXB.2026.7562.

Wang, D. W.; Li, K.; Shen, T.; Yu, X.; Du, H. Z.; Yang, H. C.; Xu, Z. K. Janus-type organic-inorganic thin-layer composite membranes for hypersaline oily wastewater desalination by membrane distillation. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.25322. DOI： CSTR： 32057.14.GFZXB.2026.7562.

摘要

膜蒸馏技术是废水脱盐的有效手段之一，但在面对高盐含油时传统疏水微孔膜面临膜润湿和污染的风险. 本研究报道了一种用于膜蒸馏的Janus型有机-无机薄层复合膜的制备策略. 该膜由有机-无机复合亲水致密薄层和疏水多孔支撑层构成，其中支撑层为聚丙烯微滤膜，亲水薄层通过多巴胺和聚乙烯亚胺的气-液界面反应形成，并进一步诱导其表面二氧化硅矿化. 亲水薄层具有优异的亲水性和水下疏油性能，水下油接触角达(163.10±2.10)°，油黏附力仅为4.3 μN. 复合薄层的存在不仅不会降低其通量，且其在处理高盐含油乳液废水时能有效抵抗油污染与乳化剂浸润. 在40 ℃温差下，其通量可达(27.59±3.05) L/(m

·h)，NaCl截留率99.9%以上，连续稳定运行7 h以上. 这一研究为面向复杂废水体系的膜蒸馏用膜的设计提供了新思路.

Abstract

Membrane distillation (MD) is one of the effective technologies for wastewater desalination; however

conventional hydrophobic microporous membranes are prone to membrane wetting and fouling when treating hypersaline oily wastewater. Herein

we report a Janus organic-inorganic thin-film composite membrane designed for this application. The membrane consists of a hydrophilic dense organic-inorganic thin layer and a hydrophobic porous support of a polypropylene microfiltration membrane. The hydrophilic thin layer was formed

via

a gas-liquid interfacial reaction between dopamine and polyethyleneimine

followed by bio-inspired silicification. The resulting hydrophilic thin layer exhibited excellent hydrophilicity and underwater oleophobicity

with an underwater oil contact angle of (163.10±2.10)° and an ultralow oil adhesion force of only 4.3 μN. Surprisingly

the thin layer did not compromise the water flux of the membrane significantly. Moreover

in direct-contact membrane distillation (DCMD) experiments treating hypersaline oily wastewater containing sodium dodecyl sulfate surfactant and mineral oil

the Janus membrane effectively resisted oil-induced membran

e wetting and fouling

maintaining stable flux of (27.59±3.05) L/(m

·h) and rejection of

99.9% during continuous operation for 7 h with a temperature difference of 40 ℃. This work will inspire the future design of membrane distillation membranes for treating complex wastewater systems.

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references

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